| 红层软岩软化的界面过程及其动力学模型 |
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| 引用本文： | 周翠英,黄思宇,刘镇,陆仪启.红层软岩软化的界面过程及其动力学模型[J].岩土力学,2019,40(8):3189-3196. |
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| 作者姓名： | 周翠英 黄思宇 刘镇 陆仪启 |
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| 作者单位： | 1. 中山大学 土木工程学院，广东 广州 510275；2. 中山大学 工学院，广东 广州 510275 |
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| 基金项目： | 国家自然科学基金（No. 41530638, No. 41472257）；广东省高层次人才特殊支持计划—科技创新青年拔尖人才项目（No. 2015TQ01Z344）；广东省省级科技计划项目（No. 2015B090925016）；广州市科技计划项目（No. 201803030005）。 |
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| 摘 要： | 红层软岩灾变和界面上的水-岩相互作用密切相关，研究界面过程对于揭示其灾变机制具有重要的意义。目前针对红层软岩软化的研究主要是宏观唯象特征的研究，红层软岩软化界面过程的研究处于探索和起步阶段，仍需要进一步地完善。针对这一问题，通过分析红层软岩软化界面过程的特征，水-岩界面上的软岩颗粒不断溶解，水在软岩中扩散，形成新的水-岩界面，基于此建立软岩系统标准熵对软岩软化进行表征，发现软岩系统标准熵值随着时间的变化规律与软岩软化崩解具有一致性；同时，利用菲克扩散定律构建软岩软化界面过程的动力学模型，很好地描述水-岩界面的生成规律；最后在红层软岩的DEM-CFD（离散元-计算流体力学耦合）模型中，软岩软化过程颗粒连接断裂代表水-岩界面的生成，对比界面过程动力学模型，取得较好的拟合结果。该研究结果对软岩软化界面过程的探索具有一定的意义。
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| 关 键 词： | 红层软岩 软化 界面过程 动力学模型 DEM-CFD |
| 收稿时间： | 2018-05-25 |
The interface process and its dynamic model of red-bed soft rock softening |
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| ZHOU Cui-ying,HUANG Si-yu,LIU Zhen,LU Yi-qi.The interface process and its dynamic model of red-bed soft rock softening[J].Rock and Soil Mechanics,2019,40(8):3189-3196. |
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| Authors: | ZHOU Cui-ying HUANG Si-yu LIU Zhen LU Yi-qi |
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| Institution: | 1. School of Civil Engineering, Sun Yat-sen University, Guangzhou, Guangdong, 510275, China;
2. School of Engineering, Sun Yat-sen University, Guangzhou, Guangdong, 510275, China |
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| Abstract: | Since the catastrophe of the red-bed soft rock is closely related to the water-rock interaction on the surface, the research on the interface process is of great significance to reveal its catastrophic mechanism. However, at present, the study on the red-bed soft rock softening mainly focuses on the macroscopic phenomenological characteristics, and the study on its interface process is still in the exploration and initial stage, which needs further improvement. The characteristics of the interface process of the red-bed soft rock softening are analyzed, which shows the soft rock particles on the water-rock interface are continuously dissolved, and the water diffuses in the soft rock to form a new water-rock interface. Based on this result, the standard entropy of soft rock is established to characterize the soft rock softening, and the evolution of the standard entropy is consistent with that of the softening and disintegration of soft rock over time. At the same time, the dynamics model of soft rock softening interface is constructed by using the Fick diffusion law, which can describe the formation rule of the water-rock interface well. Finally, in the DEM-CFD model of red-bed soft rock, the particle connection fracture in soft rock softening process represents the generation of water-rock interface. Comparing the dynamics models of the interface process, a better fitting result is achieved. The results of this study have certain significance for the exploration of soft rock softening interface. |
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| Keywords: | red-bed soft rock softening interface process dynamic model DEM–CFD |
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